You'll find a lot of good info at cinematography.com, they have a Super 8 section there. I've also found there is a huge amount of info all over the 'net, as long as you have some specific bit of info you want to find out about it's easy to search for it with good results.
I've been shooting Super 8 & Single 8 (Fuji's version of Super 8) for a year or so. I've been trying all sorts of film stock from Kodachrome to B&W, colour reversal & colour neg. Results are generally pleasing although the biggest problem I've seen is image jumping. Not sure if that's a camera issue or film cartridge.
You're lucky if you're in the USA as there are plenty of places you can deal with for stock, processing & telecine if you require that.